Quarterly report pursuant to Section 13 or 15(d)

12. Intangible assets (Tables)

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12. Intangible assets (Tables)
9 Months Ended
Sep. 29, 2018
Goodwill and Intangible Assets Disclosure [Abstract]  
Intangible assets
    September 29, 2018     December 30, 2017  
Intangible assets GeoTraq, net   $ 21,902     $ 24,699  
Patent     19       19  
    $ 21,921     $ 24,718